How to find the largest three elements in an array with C

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#include <stdio.h>
#include <limits.h>

void print3largest(int arr[], int size) { 
    if (size < 3) { 
        printf("array size < 3"); 
        return; 
    } 
    
    int first, second, third; 
   
    third = first = second = INT_MIN; 

    for (int i = 0; i < size ; i ++) { 
        if (arr[i] > first) { 
            third = second; 
            second = first; 
            first = arr[i]; 
        } 
        else if (arr[i] > second) { 
            third = second; 
            second = arr[i]; 
        } 
        else if (arr[i] > third) 
            third = arr[i]; 
    } 
    printf("The three largest elements are: %d %d %d", first, second, third); 
} 
   
   
int main() 
{ 
    int arr[] = {5, 2, 9, 6, 12, 7, 8, 3, 1, 0}; 
    int size = sizeof(arr)/sizeof(arr[0]); 
    
    print3largest(arr, size); 
    
    return 0; 
} 



/*
run:
     
The three largest elements are: 12 9 8
     
*/

 



answered Dec 1, 2021 by avibootz
edited Dec 1, 2021 by avibootz

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